Method for improving shock resistance of Y-shaped pier

Abstract

The invention belongs to the technical field of urban viaduct pier engineering, and provides a method for improving shock resistance of a Y-shaped pier. The method for improving shock resistance of the Y-shaped pier comprises the steps that a cross beam is arranged between two limb arms of the Y-shaped pier to connect the two limb arms, and meanwhile, prestressed steel bars are arranged at the cross beam of the Y-shaped pier and dense stirrups are arranged on the two limb arms and a U-shaped groove of the Y-shaped pier; and the grade of the dense stirrups at the two limb arms of the Y-shaped pier is the same as that of non-dense-region stirrups of the Y-shaped pier, and the grade of the dense stirrups at the U-shaped groove of the Y-shaped pier is preferably higher than that of the non-dense-region stirrups of the Y-shaped pier. According to the method, the prestressed steel bars are arranged on the cross beam, so that stress is clear, and positioning is convenient; the structure is similar to the triangular structure, the stability is high, and plastic hinges and a pier body are densified with the stirrups, so that the problem of reinforcement of an anti-seismic weak region near the two limb arms and the U-shaped groove is effectively solved; and the work amount is small, and the maintenance is convenient.

Description

technical field [0001] The invention relates to the technical field of urban viaduct pier engineering, in particular to a method for improving the seismic capacity of Y-shaped pier. Background technique [0002] Y-shaped piers are favored by designers of urban overpasses and viaducts for their elegant appearance. However, due to the importance of the structure and the particularity of the structure form of the pier body of the Y-shaped bridge pier, there are many weak links in these structures when the earthquake disaster occurs. At present, there is no relevant code to follow for the seismic design of Y-shaped bridge piers at home and abroad, and there are few studies on its seismic performance. The "Detailed Rules for Seismic Design of Highway and Bridges" implemented by the Ministry of Communications on October 1, 2008 has been greatly different and improved in terms of the concept and essentials of seismic design, the value of seismic action, and the essentials of seism...

AI Technical Summary

Problems solved by technology

[0003] The Y-shaped piers of urban viaducts are a kind of special-shaped piers. The research on their seismic capacity is different from that of ordinary rectangular piers, and is more related to their own size ratio. , it is also considered that the smaller floor area supports the wider bridge deck, and the pier should have a certain seismic capacity on the basis of the stability of the above conditions. Therefore, the design of the Y-shaped pier is extremely complicated.

In the past, Y-shaped bridge piers generally had poor seismic performance. As the country pays more attention to the seismic performance of urban viaducts, it is urgent to ensure that the "traffic lifeline" can play an effective role in earthquake relief in case of sudden earthquakes. Reinforcing method of anti-seismic capacity of shaped bridge piers

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